Mrs Cooper spotted the foam on her dog walk (Image: Donna Cooper)
The unusual sight of foam spilling out of a tree has been spotted by a dog walker in west Suffolk.
Donna Cooper was walking her Golden Retriever in woodlands near RAF Mildenhall, in west Suffolk, last Thursday when she noticed a large quantity of foam at the base of a tree.
The fascinating occurrence takes place when it rains after a period of dry weather.
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Known as stemflow mixing, the bubbles are formed through a chemical reaction as rainwater flows down the tree.
Mrs Cooper said she had "never seen anything like it before".
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